Deployment Guide

5. Select a distance that corresponds to the port from the Long Distance menu.
Depending on the distance selected, this might require a license. For information about the various
distances, refer to Table 18 on page 189.
If you select a long-distance setting of LD or LS, you must also enter a value in the Desired
Distance column for that port number. For LD or LS options, the Buffer Needed column is made
editable to specify the buffer needed value. On changing the buffer needed value, the Frame Size
and Desired Distance values cannot be changed.
a) Double-click the Desired Distance field for the port, as shown in Figure 36 on page 188.
b) Enter a number in the field to indicate the distance in kilometers. The allowed values
depend on the port capability:
• If the port capability is 8 GB, type a number between 10 and 63 inclusive.
• If the port capability is 4 GB, type a number between 10 and 125, inclusive.
• If the port capability is 2 GB, type a number between 10 and 250, inclusive.
• If the port capability is 1 GB, type a number between 10 and 500, inclusive.
• For the Brocade 6510, Brocade 6520, Brocade DCX 8510-8 and Brocade DCX 8510-4,
the buffer credits are 10 through X; where X is proportional to the available buffers.
This value is the upper limit for calculating buffer availability for other ports in the same
port group. If the actual distance is more than the desired distance, the port operates in
buffer-limited mode.
c) Press Enter or click another port entry for the value to be accepted.
6. Click Apply.
7. Click Yes to apply the changes, or click No to close the confirmation message window.
Administering Extended Fabrics
190 Web Tools Administrator's Guide
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